Detachable connection in nuclear reactor control system

Abstract

This disclosure enables a creation of a detachable connection between a linear motor tubular armature and a vertical cylindrical rod of an actuator of a control and protection system of a nuclear reactor. Such configuration reduces a dose load on a member of personnel, as well as provides an increase in reliability of a coupling of the linear motor tubular armature and the vertical cylindrical rod in conditions of high temperature and radiation.

What is claimed is: 
     
       1. A system comprising:
 a nuclear reactor including a linear motor tubular armature, a vertical cylindrical rod, a guide pipe, and a detachable connection between the linear motor tubular armature and the vertical cylindrical rod; 
 wherein the vertical cylindrical rod is located inside of the guide pipe; the linear motor tubular armature comprises a plurality of L-shaped slots at its end and a plurality of vertical slots above the L-shaped slots; the vertical cylindrical rod is installed inside of the linear motor tubular armature forming an annular gap between the linear motor tubular armature and the vertical cylindrical rod; 
 wherein the detachable connection includes: (i) a tubular fork with a plurality of pins located inside of the linear motor tubular armature; (ii) a plurality of radial protrusions extending on the vertical cylindrical rod; and (iii) a bushing extending inside of the guide pipe and below the vertical slots of the linear motor tubular armature, the bushing including a plurality of first profiled grooves fastened in coaxial alignment with the linear motor tubular armature such that the radial protrusions can be inserted into and removed from the first profiled grooves, each of the first profiled grooves of the bushing having a top side vertical section, two horizontal sections at different vertical levels separated by a central vertical section arranged therebetween and extending toward the central vertical section, and a lower side vertical section such that an upright L-shape is formed and an inverted L-shape is formed and the central vertical section extends between the upright L-shape and the inverted L-shape: 
 wherein the linear motor tubular armature includes a lower part that is closed by a longitudinally immovable plug having a side surface, wherein on the side surface of the longitudinally immovable plug there is a plurality of second profiled grooves configured for inserting or removing the pins of the tubular fork, each of the second profiled grooves of the longitudinally immovable plug having a lower vertical section, a central horizontal section and a top vertical section arranged such that the central horizontal section spans between the lower vertical section and the top vertical section, the lower vertical section and the top vertical section extend from the central horizontal section in opposing directions, the lower vertical section perpendicularly extends from the central horizontal section, and the top vertical section perpendicularly extends from the central horizontal section.